From The CCC Discharge and some photos of Mr.
Callahan's found on ebay

Joseph P. Callahan, CC5-197449, was born in Beard
West Virginia. He enrolled in the CCCs July 8, 1936. He was 19 years of age
at the time. His profession when he joined was a farmer and truck driver.
Mr. Callahan had blue eyes, light brown hair and fair complexion and was
six feet two inches tall.

Mr. Callahan was assigned to CCC Company 1580, Camp
F-19, in Minnehaha Springs, West Virginia. He performed labor with the rest
of the company. Then on April 1, 1937 he became one of the Company truck
drivers.

Like many CCC enrollees Mr. Callahan took some time
to himself, and was AWOL for twenty four hours from 6:00 Am April 4 to April
5 and then again from six am to ten thirty pm on April 27th. Perhaps he was
securing work for he was honorably discharged from the CCCs to accept employment
on June 9, 1937.

Afterwards at some point Mr. Callahan appears to
have joined the Army and served with the 38th Infantry Division. He left
in his effects many photos of men from this unit. Some include men posing
in barracks and beside a 38th Div HQ sign. I believe one man who appears
in more then one photo with sergeant stripes is possibly Mr. Callahan.